| Snow Treasure | McSwigan, Marie | | Fourth Grade, |
| Snow White | Grimm, Jacob | | Secondary, |
| Snow Whyte and the Queen of Mayhem | LeMaster, Leslie Jean | | Secondary, |
| Snowbound Mystery | Warner, Gertrude Chandler | Boxcar Children, The (originals); 13 | Third Grade, |
| Snowflake Bentley | Martin, Jacqueline Briggs | | Third Grade, |
| Snowmen All Year | Buehner, Caralyn | | Kindergarten, |
| Snowmen at Night | Buehner, Caralyn | | Kindergarten, |
| Snowmen at Work | Buehner, Caralyn | | Kindergarten, |
| Snowy Day, The | Keats, Ezra Jack | | First Grade, |
| Snowy Nap, The | Brett, Jan | | Kindergarten, |
| So B. It | Weeks, Sarah | | Secondary, |
| So Far From Home | Denenberg, Barry | Dear America | Sixth Grade, |
| So Far from the Bamboo Grove | Watkins, Y. Kawashima | | Fifth Grade, |
| So Far From the Sea | Bunting, Eve | | Third Grade, |
| So You Want to Be an Inventor? | St. George, Judith | | Fourth Grade, |
| So You Want to Be President? | St. George, Judith | | Fourth Grade, |
| Soar | Bauer, Joan | | Sixth Grade, |
| Soccer | Osborne, Mary Pope | Magic Tree House Research Guides (Nonfiction Companion to Soccer on Sunday) | Second Grade, |
| Soccer on Sunday | Osborne, Mary Pope | Magic Tree House; 51 | Second Grade, |
| Soccer Secret, The | Lupica, Mike | Zach & Zoe Mysteries | Third Grade, |
| Soccer Shoe Clue | Keene, Carolyn | Nancy Drew Notebooks | Second Grade, |
| Socks | Cleary, Beverly | | Fourth Grade, |
| Sojourner Truth | Roop, Peter & Connie | | Fifth Grade, |
| Sojourner Truth: Path to Glory | Merchant, Peter | Ready-to-Read Stories of Famous Americans | Second Grade, |
| Sojourner Truth: Voice of Freedom | Kudlinski, Kathleen V. | Childhood of Famous Americans | Third Grade, |
| Solar System | Cruddas, Sarah | DK findout! | Fourth Grade, |
| Solar system : Our Place in Space | Mosco, Rosemary | Science Comics | Fourth Grade, |
| Solar System, The | Ball, Nate | Let's Investigate with Nate; 2 | Third Grade, |
| Soldier Athletes | Stout, Glenn | Good Sports | Sixth Grade, |
| Soldier’s Heart | Paulsen, Gary | | Secondary, |
| Soldiers of Halla, The | MacHale, D.J. | Pendragon; 10 | Secondary, |
| Solid Truth about States of Matter with Max Axiom, Super Scientist, The | Biskup, Agnieszka | Graphic Science | Third Grade, |
| Solitary Blue, A | Voight, Cynthia | | Secondary, |
| Solving the Puzzle Under the Sea: Marie Tharp Maps the Ocean Floor | Burleigh, Robert | | Sixth Grade, |
| Some Kind of Courage | Gemeinhart, Dan | | Fifth Grade, |
| Some Writer!: The Story of E. B. White | Sweet, Melissa | | Sixth Grade, |
| Something for Joey | Peck, Richard | | Secondary, |
| Something from Nothing | Gilman, Phoebe | | First Grade, |
| Somethings Fishy | Gourounas, Jean | | Kindergarten, |
| Somewhere in the Darkness | Myers, Walter Dean | | Secondary, |
| Son of Neptune | Riordan, Rick | Heroes of Olympus; 2 | Secondary, |
| Son of Summer Stars, The | Pierce, Meredith Ann | Firebringer Trilogy; 3 | Secondary, |
| Sondok: Princess of the Moon and Stars, Korea, A.D. 595 | Holman, Sheri | Royal Diaries | Secondary, |
| Song and Dance Man | Ackerman, Karen | | Third Grade, |
| Song Lee and the “I Hate You” Notes | Kline, Suzy | Song Lee | Second Grade, |
| Song Lee and the Hamster Hunt | Kline, Suzy | Song Lee | Second Grade, |
| Song Lee and the Leech Man | Kline, Suzy | Song Lee | Second Grade, |
| Song Lee in Room 2B | Kline, Suzy | Song Lee | Second Grade, |
| Song of the Trees | Taylor, Mildred D. | | Fifth Grade, |
| Sophia’s War : A Tale of the Revolution | Avi | | Fifth Grade, |
| Sophie’s Squash Go to School | Miller, Pat Zietlow | Sophie's Squash | Kindergarten, |
| Sophie’s Squash | Miller, Pat Zietlow | Sophie's Squash | Kindergarten, |
| Sorcerer of the North, The | Flanagan, John | Ranger's Apprentice ; 5 | Secondary, |
| Sorcerer’s Shadow, The | Quinn, Jordan | Kingdom of Wrenly; 12 | Second Grade, |
| Sounder | Armstrong, William | | Sixth Grade, |
| Sounds All Around | Pfeffer, Wendy | | Third Grade, |
| Space | Osborne, Will and Mary Pope | Magic Tree House Research Guides (Nonfiction Companion to Midnight on the Moon) | Second Grade, |
| Space Cows | Seltzer, Eric | | First Grade, |
| Spaceships and Rockets | Lock, Deborah | DK Readers Level 2 | Second Grade, |
| Spacesuit, The: How a Seamstress Helped Put Man on the Moon | Donald, Alison | | Third Grade, |
| Sparky! | Offill, Jenny | | Kindergarten, |
| Special Delivery | Stead, Philip Christian | | Kindergarten, |
| Specials | Westerfield, Scott | Uglies; 3 | Secondary, |
| Speed Machine | Smith, Miranda | Kingfisher Knowledge | Secondary, |
| Spell Robbers | Kirby, Matthew J. | Quantum League ;1 | Sixth Grade, |
| Spellbound | West, Jacqueline | Books of Elsewhere; 2 | Sixth Grade, |
| Spider and the Fly, The | Howitt, Mary | | Second Grade, |
| Spider Sapphire Mystery, The | Keene, Carolyn | Nancy Drew Mystery Stories | Fourth Grade, |
| Spiders | Marsh , Laura | National Geographic Readers: Level 1 | First Grade, |
| Spiders | Bishop, Nic | | Third Grade, |
| Spiders | Gibbons, Gail | | Second Grade, |
| Spies | Gifford, Clive | Kingfisher Knowledge | Secondary, |
| Spinning Spiders | Berger, Melvin | Let's-Read-and-Find-Out Science; Stage 2 | First Grade, |
| Spirit of the Jungle | Grylls, Bear | New Jungle Book Adventures | Secondary, |
| Spirit Week Showdown | Allen, Crystal | Magnificent Mya Tibbs; 1 | Fourth Grade, |
| Splat and the Cool School Trip | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat Says Thank You! | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat : Back to School, Splat! | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat : The Perfect Present for Mom & Dad | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat and the Duck with No Quack | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat and the Late Library Book | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat for President | Bright, J. E. | Splat the Cat | Kindergarten, |
| Splat the Cat Sings Flat | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splat the Cat Takes the Cake | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Splish, Splash, Splat | Scotton, Rob | Splat the Cat (Original) | Kindergarten, |
| Spring After Spring: How Rachel Carson Inspired the Environmental Movement | Sisson, Stéphanie Roth | | First Grade, |
| Sprinkle of Spirits, A | Meriano, Anna | Love Sugar Magic; 2 | Fifth Grade, |
| Spunky Monkeys on Parade | Murphy, Stuart J. | | First Grade, |
| Spy in the House, A | Lee, Y.S. | Agency, The; 1 | Secondary, |
| Squanto, Friend of the Pilgrims | Bulla, Clyde Robert | | Third Grade, |
| Squashed | Bauer, Joan | | Secondary, |
| Squint | Morris, Chad & Brown, Shelly | | Fifth Grade, |
| Squire | Pierce, Tamora | Protector of the Small; 3 | Secondary, |
| Stage Fright on a Summer Night | Osborne, Mary Pope | Magic Tree House; 25 | Second Grade, |
| Stallion by Starlight | Osborne, Mary Pope | Magic Tree House; 49 | Second Grade, |
| Stand Tall, Abe Lincoln | St. George, Judith | | Third Grade, |
| Stand Tall, Molly Lou Melon | Lovell, Patty | | First Grade, |
| Standing in the Light | Osborne, Mary Pope | Dear America | Fifth Grade, |
| Stanley in Space | Brown, Jeff | Flat Stanley | Second Grade, |